Hedgehog drum Type I 307 B with welded, round sleeve pipes for the separation of piece-sprue combinations that tend to interlock.
Combination of hedgehog and perforated drum Type I 307 B Sonder for 2-stage separation; i.e., three different pieces can be separated from each other.
Hedgehog drum Type I 205 B for use in separating pieces in a clean room.
This perforated separation drum is a novelty in the MTF separation program. The "hedgehog drum" is especially suited for the separation of parts with very complex differing piece geometries. The sleeve pipes attached to the outside of the drum cage ("hedgehog quills") have the task of preventing the larger pieces from wriggling through the holes or any pieces from getting caught in the holes.
The sleeve pipes or "hedgehog quills" prevent the larger pieces from wandering through the holes or any pieces from getting caught in the holes.